<template>
	<view>
		<!-- 使用自定义搜索组件 -->
		<my-search @myclick="gotoSearch"></my-search>
		<!-- <my-search :bgcolor="'#000000'" :radius="3"></my-search> -->
		<view class="scroll-view-container">
			<!-- 左侧的滚动视图区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<view v-for="(item, i) in cateList" :key="i" :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChange(i)">
					{{item.cat_name}}
				</view>
			</scroll-view>
			<!-- 右侧的滚动视图区域 -->
			<scroll-view class="right-scroll-view" :scroll-top="scrollTop" scroll-y :style="{height: wh + 'px'}">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 动态渲染三级分类的列表数据 -->
					<view class="cate-lv3-list">
						<!-- 三级分类item项 -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 图片 -->
							<image :src=item3.cat_icon></image>
							<!-- 文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
// 导入自己封装的mixin模块
import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		// 将badgeMix混入到当前页面中进行使用
		mixins: [badgeMix],
		data() {
			return {
				wh: 0,
				// 分类数据列表
				cateList: [],
				active: 0,
				// 二级分类列表
				cateLevel2: [],
				// 滚动条距离顶部的距离
				scrollTop: 0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			// 调用方法，获取分类列表数据
			this.getCateList()
		},
		methods: {
			async getCateList(){
				const {data: res} = await uni.$http.get('/api/public/v1/categories')
				// 判断是否获取失败
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				// 为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChange(i){
				this.active = i
				// 为二级分类列表重新赋值
				this.cateLevel2 = this.cateList[i].children
				// 让scrollTop的值在0与1之间切换
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: #FFFFFF;
				position: relative;
				
				&::before{
				  content: ' ';
					width: 3px;
					height: 30px;
					background-color: #C00000;
					position: absolute;
					top: 25%;
					// top: 50%;
					left: 0;
					// transform: translateY(-50%);
					
				}
			}
		}
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		 display: flex;
		 flex-wrap: wrap;
		 .cate-lv3-item{
			 width: 33.33%;
			 display: flex;
			 flex-direction: column;
			 justify-content: center;
			 margin-bottom: 10px;
			 image{
				 width: 60px;
				 height:60px;
			 }
			 text{
				 font-size: 12px;
			 }
		 }
	}
}
</style>
